KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 58. NIO 2. 



39 



pages 1 further below, viz: »Der imtere Eand des Jochbogens erscheint in der Seitenan- 

 siGht etwa in der Höhe der Zahnwurzel der Molaren» . 



In all tlie present seven specimens the lower margin of the zygomatic arch is well 

 above the alveolar margin of the molars, the distance varying from 9 — 10 mm. in the 

 adnlt (Pl. XII, fig. 1) to 6 mm. in some immature specimens. 



As Matschie had not mentioned anything about this in his description of C. a. 

 ituricus I took the liberty of writing to him and asked about the condition of the zygo- 

 matic arch in the Ituri race. He kindly replied that it was as in other members of Cerco- 

 cebus »6 — 10 mm. iiber der Höhe des Alveolarrandes ». This question is thus settled, 

 and in this respect the present specimens agree with the types. 



The dimensions of some skulls in this collection are recorded below. 



The upper molar series of this Mangabey is lighty and evenly arched as in »C. a. 

 johnstoni» unlike C. a. zenkeri fide Schwarz. The palatal roof is also shaped about in the 

 same way as Schwarz has described that of »C a. johnstoni» viz. »im Querschnitt fast 

 rechteckig mit dem Knick am oberen Wurzelende der Molaren». 



Greatest length of skull 



Basal length of skull 



Condylobasal length of skull . . . 



Xasion — gnathion 



Nasion — inion 



Palate length 



Palate breadth inside canines . . 



Length of nasals 



Breadth of nasals 



Zygomatic (greatest; width .... 



Least postorbital width 



Breadth across the orbits .... 



Width of brain-case 



Mastoid breadth 



Breadth across canines 



Back of m 3 to front of c (alveolar) 

 Back of m 3 to front of c (alveolar) 

 Length of upper molars only . . . 

 Greatest transverse diameter of m 3 



Length of m 2 

 Length of m 3 



(f old, Beni 9 . Rutshuru 



$ old, Beni 



Gnathion to hind margin of jugale 



120,6 mm. 



(15,5 

 101 



57 



90 

 53(49,6) » 



21 



3U 

 9,3 » 



82,6 » 



47 



60,8 » 



63,3 » 



71,8 » 



34 



37,1 » 

 40,6 » 

 29 



7 



7,5 » 



T.N » 



53,6 » 



115 



76 

 84 

 47 

 79 



211 

 21,5 



7 

 71 

 43 

 56 

 61 

 62 

 29,5 

 35 

 39 

 29,5 



6,6 



7,1 

 8 



43 



mm. 1 16,5 mm. 



95 

 53 

 84 



48(43,5) 

 20 

 21 



75,5 

 42,9 

 62 

 58,5 

 65 

 32,4 

 37,4 

 41,2 

 28,5 

 6,2 



7,2 



8 



another 



i $ with 



unworn 



teeth 



52,6 



1 1. c. p. 269. 



2 In another female 24,5 mm, 



3 In a young but adnlt female this diameter of the unworn tooth is 6,9 mm. 



